Behavior/Health Concerns:  Some white-capped Pionus parrots can become aggressive and territorial, so socialize your bird early on to minimize this behavior. They may become aggressive toward their owner if they are not handled and played with regularly. Sleep is important for all Pionus parrots, so let them have 11 or 12 hours every night. These pet birds are susceptible to vitamin-A deficiency, visceral gout, aspergillosis (respiratory disease), fungal infections and obesity. While white-capped Pionus parrots love to eat, the high-fat foods they often enjoy should be reserved as special treat. Provide your Pionus parrot with a mixed seed and pellet-based diet along with fruits and vegetables. Skewer vegetables on a kabob for your white-capped Pionus to gnaw on. White-capped Pionus parrots prefer cabbage, broccoli, peas and carrots.